The most copied bonus round in modern pokies was invented here. Hold and Spin first appeared on Aristocrat's Lightning Link, which launched across Australia and New Zealand in 2014, and it came from the mind of Australian designer Scott Olive, as GGB Magazine documented in December 2022. Australians didn't simply take to that style of feature. We wrote the template everyone else copied.
That's worth knowing, because pokies sit at the centre of how this country plays. Roy Morgan's single-source research, reported by Australian Hotelier, found pokies account for 56.7% of every dollar gambled in Australia, against 20.7% for all betting forms combined.
Themes aren't decoration sitting on top of the maths; they're a signal telling you what kind of bonus round is underneath. Egyptian and Asian-fortune artwork usually means locking symbols and jackpot tiers. Fishing means collect and multiply. Greek mythology means tumbles with multipliers. Once you can read that, a lobby full of thumbnails starts making sense.
You can test all of it for free, too. Spinbit sorts its pokies by theme and runs demo mode on most titles, so nothing below has to be taken on faith. When you're ready to play for stakes, claiming the spinbit bonus first gives you more spins to put these bonus rounds through their paces.
Reading The Reels Before You Spin
Studios pair art with mechanics because visuals are the quickest way to tell you what you're about to play. A coin, a jar, a book, a fish; each one carries an expectation, and the maths behind it was built to meet that expectation.
Here's how the main pairings hold up against verified game data.
None of these pairings happened by accident, and none of them happened in a boardroom either. They were inherited. Egyptian games got expanding symbols because a book that opens and fills the screen fits a story about uncovering something buried. Fishing games got a collect ladder because catching things is the entire premise. The artwork arrived first and the maths was designed to serve it, which is why the pattern has stayed so consistent across competing studios for two decades.
The Aussie Invention Everyone Borrowed
Of all those pairings, one has outperformed the rest by a distance, and it's the one we know best.
Every other bonus round keeps its outcome hidden until the last spin. Hold and Spin does the opposite; you watch the board fill in front of you, position by position, and you know precisely what you're chasing while you chase it. That visibility is the reason it spread to every studio in the business, and it's why themes built around collecting things keep coming back to it. The jackpot tiers sitting above those respin rounds work on the same shared-pool logic.
Scott Olive, who created the mechanic at Aristocrat, put it to GGB Magazine like this:
"With Hold & Spin, what you see is what you get. The mechanics make it exciting for players to see what they are chasing in the game. Simplicity is the secret ingredient for the best and most enduring games."
The numbers support him. Lightning Link and Dragon Link combined took more than a quarter of theoretical net win across the premium slot segment in the Eilers-Fantini Game Performance Database, according to GGB Magazine. More recently, Business of iGaming analysed Aristocrat's FY2025 results and found group revenue of A$6.3 billion with the Gaming segment at A$3.96 billion, up 9%, with the Link franchises still named among leading performers. Player opinion agrees; in the 2025 Casinos.com Slots Hall of Fame, judged by more than 400 participants, Dragon Link took People's Choice at 4.08 out of 5 while Lightning Link was an expert selection, per Business Wire.
If you want to feel how that design thinking travels into online titles, Spinbit's slots library carries plenty of it, with collect-driven games like The Dog House and Gems Bonanza alongside a dedicated Bonus Buy section.
Twelve years on, nobody has improved on it. That tells you something.
When The Theme Tells You Everything
Knowing which engine you're sitting in changes what a session feels like, because the three big ones behave in completely different ways.
With Gates of Olympus, the detail that separates the bonus from ordinary play is persistence; during free spins those multiplier orbs add together and don't reset after a tumble that pays nothing, which Flush sets out in its breakdown of the game. Big Bass Bonanza works to a fixed structure instead, and the ladder stops after the third retrigger, which is the reason its maximum sits at 2,100x rather than running open-ended, as SlotExpanse explains. Book of Dead puts everything on one card; a single symbol is picked at random when the round begins and carries the whole bonus, according to Play'n GO's own guide.
You can spot most of this before you commit anything:
Locking coins or jars on the thumbnail usually means a respin round with jackpot tiers above it
A book, scroll or tomb icon usually means one expanding symbol doing all the work
Falling or exploding symbols usually mean tumbles, where multipliers build rather than reset
A stated max win far beyond 5,000x usually points to stacking multipliers, not a fixed ladder
An ante bet option means paying more per spin for a more frequent bonus, as with Fury of Anubis at 60x
The bigger bonus isn't always the one you'll enjoy more. A ladder that pays in steady increments and a multiplier round that does very little for eight tumbles then everything on the ninth are two different afternoons. Which of those suits the way you like to play?
Spinbit's Bonus Buy category happens to include Book of Dead, Big Bass Bonanza and Gates of Olympus, which are the three cleanest examples of the three engines, so comparing them side by side is straightforward.
Studios Are Mixing The Signals
The shorthand still works, though 2026 has seen studios break their own rules on purpose, which makes a quick look at the info screen more useful than it's ever been.
What's going on is a separation of art from engineering. For the decade of Hold and Spin imitation that GGB Magazine traced, the theme carried the mechanic; now studios trust players enough to drop a respin round onto a fruit machine and a cluster grid onto a pharaoh. The signal is getting noisier, and the people who come out ahead are the ones who spend thirty seconds reading the game page first.
Two things worth being upfront about. Pragmatic ships certified 96.50%, 95.50% and 94.50% versions of some titles, so the RTP you're served depends on where you play. And the Jade Legends figures came from pre-launch announcements confirmed close to release, so treat them as such.
The Thumbnail Was Always Telling You
Themed pokies aren't decorated maths. The decoration is the instruction manual, written over twenty years by studios teaching players a visual language, with Australian design work sitting right at the centre of it. Learning to read that language costs nothing and changes how every lobby looks.
Where it goes next is interesting. As tier-two triggers like the Super Scatter spread and wheel selectors hand the decision over to you, we're heading towards games where you choose which bonus you're chasing rather than taking whichever one turns up.
Until then, the habit that pays is checking the rules before you spin; studio guides such as Play'n GO's walkthrough of Book of Dead spell out exactly how a round is built. Spinbit is open to Australian players, runs demo mode across most of its library, processes deposits instantly with no deposit fees, and pairs Tuesday Free Spins and weekend reloads with a VIP loyalty programme that pays out in free spins. Easy enough to put the theory to work there.
Advisory Notice: Gambling should be treated as a form of entertainment, not a source of income. Set a budget you can afford to lose before you start playing, know your limits in advance, and walk away if you find yourself chasing losses or feeling pushed to keep going. If the enjoyment fades and worry sets in, confidential support is available at any time through Gambling Help Online.
There have even been fan petitions circulating to convince Netflix to bring it back. Maybe those fan petitions should have been directed at Fincher instead.